Seafarer hiding in the distance (4)
I believe the answer is:
afar
'in the distance' is the definition.
(far away)
'seafarer hiding' is the wordplay.
'hiding' indicates a hidden word.
'AFAR' is hidden in the letters of 'seafarer'.
(Other definitions for afar that I've seen before include "Many a mile" , "Inhabitant of Ethiopia" , "Not in this neighbourhood" , "At a distance (poetic)" , "Pull out at a distance" .)